CN106529383A - Fingerprint sensor detection method and device, fingerprint sensor and electronic equipment - Google Patents
Fingerprint sensor detection method and device, fingerprint sensor and electronic equipment Download PDFInfo
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- CN106529383A CN106529383A CN201610427545.XA CN201610427545A CN106529383A CN 106529383 A CN106529383 A CN 106529383A CN 201610427545 A CN201610427545 A CN 201610427545A CN 106529383 A CN106529383 A CN 106529383A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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Abstract
The invention discloses a detection method, which is used for detecting a fingerprint sensor. The fingerprint sensor comprises electrodes, wherein the electrodes comprise sensor electrodes. The detection method comprises a detection step and a judgment step, wherein the detection step is implemented by applying a driving signal to part of the electrodes in a predetermined manner, and detecting sensing signals coupled by the rest of the electrodes till sensing signals of all the sensor electrodes are obtained; and the judgment step is implemented by judging whether the sensor electrodes are defective according to the sensing signals on the sensor electrodes. The detection method and a detection device provided by the invention can judge whether the sensor electrodes are defective according to voltage variation information of the sensor electrodes through applying the driving signal to the electrodes of the fingerprint sensor and coupling the driving signal to the rest of electrodes by utilizing an edge electric field, therefore, the detection can be conducted without applying a finger or a conductor to the fingerprint sensor, and the detection efficiency is improved.
Description
Technical field
The present invention relates to fingerprint sensor field, more particularly to a kind of detection method and inspection for detecting fingerprint sensor
Survey device, fingerprint sensor and electronic equipment.
Background technology
Self-tolerant fingerprint sensor includes the sensor electrode for detecting circuit and two-dimensional array arrangement.During use, detection electricity
Road applies drive signal to each sensor electrode, and detects the induced signal of each sensor electrode, each sensor electrode
Constitute a pixel of fingerprint sensor.Thus, when finger is applied to fingerprint sensor, each sensor electrode just can be examined
The change in voltage that fingerprint correspondence a little causes is surveyed, it is such that it is able to describe the corresponding depth of any of fingerprint and electric with other sensors
Pole (pixel) describes the lines of whole fingerprint jointly, forms fingerprint image.
However, sensor electrode itself and sensor electrode there may be defect with the connection of detection circuit, cause fingerprint
There is bad point in sensor, some defects may cause whole fingerprint sensor cannot normal work, or even in fingerprint sensor group
May cause the whole fingerprint recognition module cannot normal work after being attached to fingerprint recognition module.Therefore, the detection of fingerprint sensor
It is particularly significant.
However, (e.g., the at present detection of fingerprint sensor needs to apply finger or other conductive materials on fingerprint sensor
Conducting resinl), the induced signal of each sensor electrode is then detected, judges whether to meet the requirements, it is inconvenient, and detect
Efficiency is low.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art.For this purpose, the present invention provides a kind of using
In detection method and detection means, fingerprint sensor and the electronic equipment of detection fingerprint sensor.
The present invention provides a kind of detection method, and for detecting fingerprint sensor, the fingerprint sensor includes electrode, described
Electrode includes sensor electrode, and the detection method is comprised the following steps：
Detecting step, applies drive signal to the part electrode in a predefined manner, and detects other electrode institute couplings
The induced signal for closing, until obtain the induced signal of all sensor electrodes；And
Judge step, judge the sensor electrode with the presence or absence of scarce according to the induced signal on the sensor electrode
Fall into.
In some embodiments, the detecting step senses principle based on mutual capacitance type, and the part electrode is applied to drive
Dynamic signal simultaneously detects induced signal that other described electrodes are coupled to.
In some embodiments, the sensor electrode is arranged in two-dimensional array, and the detecting step includes following son
Step：
Drive signal is applied to the sensor electrode of n*k+c row or column, wherein, k for natural number and including zero, n is
Natural number and more than or equal to 2, c be natural number and including zero, c less than n, n*k+c≤N, and c it is different from k when be zero, N be it is described
Total line number of sensor electrode or total columns；
The induced signal of the sensor electrode of the detection in addition to the sensor electrode of n*k+c row or column；
Sensor electrode described in a row or column in addition to the sensor electrode of n*k+c row or column is applied to drive letter
Number；And
The induced signal of the sensor electrode of detection n*k+c row or column.
In some embodiments, the sensor electrode is arranged in two-dimensional array, and the detecting step includes following son
Step：
Drive signal is applied to the sensor electrode of 2*k+1 row or column, wherein, 2*k+1≤N, k are natural number and bag
Include total line number or total columns that zero, N is the sensor electrode；
The induced signal of the sensor electrode of detection 2k row or column；
Drive signal is applied to the sensor electrode of 2k row or column；And
The induced signal of the sensor electrode of detection 2*k+1 row or column.
In some embodiments, the electrode also includes the protection ring around the sensor electrode, the detection side
Method includes：
Drive signal is applied to the protection ring；And
Detect the induced signal of the sensor electrode.
The present invention provides a kind of detection means, and for detecting fingerprint sensor, the fingerprint sensor includes electrode, described
Electrode includes sensor electrode, it is characterised in that the detection means includes：
Detection module, for applying drive signal to the part electrode in a predefined manner, and detects other described electrodes
The induced signal being coupled to, until obtain the induced signal of all sensor electrodes；And
Judge module, for judging the sensor electrode with the presence or absence of scarce according to the induced signal of the sensor electrode
Fall into.
In some embodiments, the detection module is to sense principle based on mutual capacitance type the part electrode is applied to drive
Dynamic signal simultaneously detects induced signal that other described electrodes are coupled to.
In some embodiments, the sensor electrode is arranged in two-dimensional array, and the detection module is used for：
Drive signal is applied to the sensor electrode of n*k+c row or column, wherein, k for natural number and including zero, n is
Natural number and more than or equal to 2, c be natural number and including zero, c less than n, n*k+c≤N, and c it is different from k when be zero, N be it is described
Total line number of sensor electrode or total columns；
The induced signal of the sensor electrode of the detection in addition to the sensor electrode of n*k+c row or column；
Sensor electrode described in a row or column in addition to the sensor electrode of n*k+c row or column is applied to drive letter
Number；And
The induced signal of the sensor electrode of detection n*k+c row or column.
In some embodiments, the sensor electrode is arranged in two-dimensional array, and the detection module is used for：
Drive signal is applied to the sensor electrode of 2*k+1 row or column, wherein, 2*k+1≤N, k are natural number and bag
Include total line number or total columns that zero, N is the sensor electrode；
The induced signal of the sensor electrode of detection 2k row or column；
Drive signal is applied to the sensor electrode of 2k row or column；And
The induced signal of the sensor electrode of detection 2*k+1 row or column.
The present invention provides a kind of fingerprint sensor, it is characterised in that include：
Multiple sensor electrodes, arrange in two-dimensional array；With
Detection means, including：
Drive module, is connected with the plurality of sensor electrode alternative, provides drive signal to described for timesharing
Multiple sensor electrodes；
Receiver module, is connected with the plurality of sensor electrode alternative, for receiving from the plurality of sensor
The sensing signal of electrode output；With
Judge module, the sensing signal received according to the receiver module are electric come the sensor for judging whether defect
Pole.
In some embodiments, the judge module it is whether identical according to the sensing signal for receiving or it is approximately the same come
Judge that the sensor electrode whether there is defect.
In some embodiments, in synchronization, the drive module is electrically connected with operative sensor electrode, described to connect
Receive module to electrically connect with another part sensor electrode, between two parts sensor electrode, form mutual capacitance.
In some embodiments, the fingerprint sensor is mutual capacitance type when detection sensor electrode whether there is defect
Fingerprint sensor.
In some embodiments, the fingerprint sensor further includes fingerprint sensing circuit, the fingerprint sensing electricity
Road is used for driving the plurality of sensor electrode to perform fingerprint sensing, and the fingerprint sensor is from appearance when fingerprint sensing is performed
Formula fingerprint sensor.
The present invention provides a kind of electronic equipment, including the fingerprint sensor described in above-mentioned middle any one.
The detection method and detection means of embodiment of the present invention applies to drive by the electrode in fingerprint sensor itself
Signal, and drive signal is coupled to into other electrodes using fringe field, such that it is able to the change in voltage according to sensor electrode
Information judges that sensor electrode whether there is defect.It is therefore not necessary to apply finger and electric conductor just can be with to fingerprint sensor
Detection, improves detection efficiency.Correspondingly, the quality of the fingerprint sensor and electronic equipment is higher.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention can be from the description with reference to accompanying drawings below to embodiment
Will be apparent from it is easy to understand, wherein：
Fig. 1 is the schematic flow sheet of the detection method of embodiment of the present invention.
Fig. 2 is a kind of schematic diagram of fingerprint sensor.
Fig. 3 is the high-level schematic functional block diagram of the detection means of embodiment of the present invention.
Fig. 4 is the structural representation that detection means shown in Fig. 3 is connected with partial electrode.
Fig. 5 is a schematic diagram of the detection method of embodiment of the present invention.
Fig. 6 is another schematic diagram of the detection method of embodiment of the present invention.
Fig. 7 is another schematic diagram of the detection method of embodiment of the present invention.
Fig. 8 is the schematic diagram of the detection method of another embodiment of the invention.
Fig. 9 is the structural representation of an embodiment of electronic equipment of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of embodiment is shown in the drawings, wherein, identical or class
As label represent same or similar element or the element with same or like function from start to finish.
It is exemplary below with reference to the embodiment of Description of Drawings, is only used for explaining the present invention, and is not understood that
For limitation of the present invention.
Further, described feature, structure can in any suitable manner with reference in one or more embodiment party
In formula.In the following description, there is provided many details are fully understood to embodiments of the present invention so as to be given.So
And, one of ordinary skill in the art would recognize that, there is no one or more in the specific detail, or using other structures,
Constituent element etc., it is also possible to put into practice technical scheme.In other cases, it is not shown in detail or describes known features or behaviour
Make to avoid the fuzzy present invention.
Fig. 1 and Fig. 2 is referred to, the detection method of embodiment of the present invention is used for detecting fingerprint sensor 10, fingerprint sensing
Device includes electrode 12, and electrode 12 includes sensor electrode 122.It is preferred that multiple sensor electrodes 122 are arranged in two-dimensional array.
So, ground is changed, multiple sensor electrodes 122 can also be in that Else Rule or non-regular are arranged.Detection method includes following
Step：
Detecting step, applies drive signal to partial electrode 12 in a predefined manner, and detects that other electrodes 12 are coupled to
Induced signal, until obtaining the induced signal on all the sensors electrode 122；And
Judge step, judge that sensor electrode 122 whether there is defect according to the induced signal on sensor electrode 122.
It is preferred that operation principle of the detecting step based on mutual capacitance, detects to sensor electrode 122.
Fig. 3 and Fig. 4 is seen also, the detection means 20 of embodiment of the present invention includes detection module 22 and judge module
24.Detection module 22 is used for applying drive signal to partial electrode 12 in a predefined manner, and detects that other electrodes 12 are coupled to
Induced signal, until obtaining the induced signal of all the sensors electrode 122.Judge module 14 is for according to sensor electrode
Induced signal on 122 come judge sensor electrode 122 whether there is defect.
In some embodiments, detection method can be implemented by detection means 20, and for example detecting step can be by detecting
Module 22 is implemented, and judges that step can be implemented by judge module 24.
The detection method of embodiment of the present invention and detection means 20 are applied by the electrode 12 in fingerprint sensor 10 itself
Plus drive signal, and drive signal is coupled to into other electrodes 12 using fringe field, such that it is able to according to sensor electrode 122
On the induced signal that is coupled to whether there is defect judging sensor electrode 122.For example, drive signal, induced signal are equal
For voltage signal.During detection, sensor electrode 122 can be obtained under fringe field coupling by theoretical or experiment
Then the magnitude of voltage of the sensor electrode 122 for detecting is compared by the scheduled voltage of induced signal with scheduled voltage, if
Equal or approximately equal to scheduled voltage, then prove that sensor electrode 122 also normally can be detected in normal work,
Therefore not existing defects be may determine that.On the contrary, then may determine that sensor electrode 122 there may be defect.It is therefore not necessary to apply
Plus finger and electric conductor just can be detected on fingerprint sensor 10, detection efficiency is improved.
Electrode 12 can be Copper Foil, and be formed at substrate (not shown) by semiconductor technology, so as to constitute fingerprint sensing
The part-structure of device 10.In some embodiments, electrode 12 can be entirely sensor electrode 122.Each sensor electrode
122 pixels that may be constructed fingerprint sensor 10.Thus, can be by the number of setting sensor electrode 122 and arrangement
The parameters such as the sensing region and resolution of control fingerprint sensor 10.
Further, the detection module 22 includes drive module 221 and receiver module 223.The drive module 221 with
The 122 alternative connection of the plurality of sensor electrode, provides drive signal to the plurality of sensor electrode for timesharing
122.The receiver module 223 is connected with 122 alternative of the plurality of sensor electrode, for receiving from the plurality of biography
The sensing signal of the output of sensor electrode 122.The judge module 24 connects the receiver module 223, for according to the reception
The sensing signal that module 223 is received is judging whether the sensor electrode 122 of defect.
The drive module 211 is for example alternative with the plurality of sensor electrode 122 even by switching (not shown)
Connect.The receiver module 223 is for example connected with 122 alternative of the plurality of sensor electrode by switching (not shown).
In synchronization, the drive module 211 is electrically connected with operative sensor electrode 122, the receiver module 223 with
Another part sensor electrode 122 is electrically connected, and forms mutual capacitance between two parts sensor electrode 122.
Citing ground, the drive module 221 are electrically connected by switch with the sensor electrode 122 of the first row, there is provided driven
Sensor electrode 122 of the signal to the first row.The sensor electrode 122 of the receiver module 223 and the second row is by switching electricity
Connection, receives the sensing signal of the sensor electrode 122 from the second row.The judge module 24 is according to the receiver module
223 sensing signals for receiving are judging the electrode in the sensor electrode 122 of the second row with the presence or absence of defect.For example, if institute
The sensor electrode 122 of the second row not existing defects are stated, the sensing signal that the receiver module 223 is received should be all identical
Or it is approximately the same.If having 122 existing defects of sensor electrode, existing defects in the sensor electrode 122 of second row
Sensor electrode 122 export to the sensing signal of receiver module 223 and be different or differ markedly from other normal sensors
The sensing signal exported by electrode 122.
In detection, the detection means 20 is detected using mutual capacitance type sensing principle, wherein, the sensing of the first row
The sensor electrode 122 of device electrode 122 and the second row forms mutual capacitance.
Similarly, defects detection is carried out to the sensor electrode 122 of other even number lines using mutual capacitance type Cleaning Principle, when
The sensor electrode 122 of all even number lines detect it is qualified after, then defects detection is carried out to the sensor electrode 122 of odd-numbered line,
Until having detected all of sensor electrode 122.
So, the application does not limit to above-mentioned detection ordering, changes ground, can be other suitable detection modes yet yet, example
Such as the sensor electrode 122 of the second row is detected it is qualified after, defect is carried out to the sensor electrode 122 of the first row just next
Detection is also possible.
It is preferred that the detection means 20 is arranged in the fingerprint sensor 10, the fingerprint sensor 10 is a core
Piece.So, ground is changed, the detection means 20 is alternatively independently of the device outside the fingerprint sensor 10.
In addition, fingerprint sensor 10 further includes fingerprint sensing circuit (not shown).The fingerprint sensing circuit is used for
The plurality of sensor electrode 122 is driven to perform fingerprint sensing.The fingerprint sensing circuit provides pumping signal and gives sensor electricity
Pole 122 simultaneously receives the fingerprint sensing signal exported from sensor electrode 122, so as to obtain finger print information.
Different from the matching relationship of sensor electrode 122 according to detection circuit, fingerprint sensor 10 can be that self-tolerant refers to
Stricture of vagina sensor or mutual capacitance type fingerprint sensor, self-tolerant fingerprint sensor refer mainly to encourage and detect all by same sensing
Device electrode is carried out, and mutual capacitance type fingerprint sensor is then referred mainly to some specific sensor electrode excitations, and detects right therewith
The change in voltage of the sensor electrode answered.
The fingerprint sensor 10 of embodiment of the present invention is self-tolerant fingerprint sensor when fingerprint sensing is performed, in detection
When sensor electrode 122 whether there is defect, then it is mutual capacitance type fingerprint sensor.
It should be noted that detection sensor electrode 122 is fingerprint module factory in fingerprint sensor 10 with the presence or absence of defect
The detection carried out before dispatching from the factory.It is to be assembled into electronic equipment when fingerprint sensor 10 that fingerprint sensor 10 performs fingerprint sensing
The work carried out after on 100 (for example, mobile phones, see below).
Citing ground, the fingerprint sensing circuit are two different circuits from the detection means 20, or, the fingerprint
The circuit of sensing circuit multiplexing part detection means 20, for example, multiplexing reception module 223.The fingerprint sensor 10 can enter one
Step includes control unit (not shown), and described control unit controls fingerprint detection circuit for the instruction that basis is received come correspondence
Work with the detection means 20.When defects detection is carried out, the instruction is for example from testing equipment.When execution fingerprint sensing
When, the instruction for example carrys out the main control chip of electronic equipment 100 (seeing below) described in self-application.
As previously described, when detection sensor electrode 122 whether there is defect, for example, can be by controlling detection electricity
Road applies drive signal to operative sensor electrode 122, then detects the sensing letter is coupled to by remaining sensor electrode 122
Number come judge sensor electrode 122 whether there is defect.
In the electrode 12 entirely embodiment of sensor electrode 122, detecting step includes following sub-step：
Drive signal is applied to the sensor electrode 122 of n*k+c row or column, wherein, k is natural number and is certainly including zero, n
So number and more than or equal to 2, c be natural number and including zero, c it is different from c less than n, n*k+c≤N, and k when be zero, N be the biography
Total line number of sensor electrode or total columns；
Induced signal on sensor electrode 122 of the detection in addition to the sensor electrode 122 of n*k+c row or column；
Drive signal is applied to a line in addition to the sensor electrode 122 of n*k+c row or column or sensor electrode 122；
And
The induced signal of the sensor electrode 122 of detection n*k+c row or column.
In some embodiments, above-mentioned sub-step can be realized by detection module 12, be that is to say, detection module 12 can
Apply drive signal for the sensor electrode 122 to n*k+c row or column, wherein, k is natural number and is nature including zero, n
It is natural number and the biography including zero, c less than n, detection in addition to the sensor electrode 122 of n*k+c row or column to count and be more than or equal to 2, c
The induced signal of sensor electrode 122, a line sensor electrode 122 in addition to the sensor electrode 122 of n*k+c row or column is applied
The induced signal of the sensor electrode 122 of drive signal and detection n*k+c row or column.
In these embodiments, the sensing principle based on mutual capacitance, indeed through to embarking on journey or sensing in column
Device electrode 122 applies drive signal to obtain the induced signal of all the sensors electrode 122.Thus, the applying of drive signal and
The detection of induced signal is more regular, can simplify the control of detection circuit, in addition, the process of the induced signal to detecting
It is easy also to become.
It is appreciated that n, k and c are constant, and non-variables, it is possible to arrange according to demand.
It is appreciated that n than it is larger when, drive signal will be applied to the sensor electrode 122 for being spaced distant row or column,
So, it is understood that there may be from the sensor electrode 122 farther out of sensor electrode 122 for applying drive signal, cause induced signal compared with
It is weak, even if it should also be recognized, however, that such embodiment, induced signal is not than applying during drive signal by force, therefore yet yet
Detection can be realized.For example, work as n=10, c=1, i.e., drive signal is applied to the sensor electrode 122 of 10k+1 row or column, then
The sensor electrode 122 of 5k+1 row or column is from 5 row or column of sensor electrode for applying drive signal, distant, accordingly, it is possible to lead
Cause the sensing letter signal that the sensor electrode 122 of 5k+1 row or column is produced weaker.But, such induced signal still can be used
In detection sensor electrode 122.And in such embodiment, can be to the sensor electrode 122 of fewer row or column
Apply drive signal and be capable of achieving detection, therefore, it can reduce the power consumption of detection.
Certainly, in other implementations, for more efficient, more accurately detection sensor electrode 122, it is also possible to close
Reason arranges n, so as to avoid induced signal weaker.It is appreciated that n is less, the induced signal that same drive signal can be produced
It is stronger.Fig. 5, n=2, c=1 is referred to, in other words the sub-step of detecting step is：
Drive signal is applied to the sensor electrode 122 of odd number (2k+1) row；
The induced signal of the sensor electrode 122 of detection even number line (in addition to odd-numbered line)；
The sensor electrode 122 of antithesis several rows (in addition to odd-numbered line) applies drive signal；And
The induced signal of the sensor electrode 122 of detection odd-numbered line (2k+1).
Fig. 6 is referred to, another example of embodiment above can be that sensor electrode 122 in column is applied to drive
Signal, and n=2, c=1, in other words the sub-step of detecting step be：
The sensor electrode 122 arranged to odd number (2k+1) applies drive signal；
The induced signal of the sensor electrode 122 of detection even column (in addition to odd column)；
The sensor electrode 122 of dual sequence (in addition to odd column) applies drive signal；And
The induced signal of the sensor electrode 122 of detection odd column (2k+1).
The benefit of both the above example is, due to the sensor electrode 122 for being applied in drive signal and examined sensing
Device electrode 122 is interlacing, and the coupling effect of fringe field is strong, therefore the voltage signal for detecting is strong, beneficial to judgement below.
Fig. 6 is referred to, in other example, can apply drive signal to rows of sensor electrode 122, and n
=3, c=1, in other words the sub-step of detecting step be：
Drive signal is applied to the sensor electrode 122 of 3k+1 rows；
The induced signal of sensor electrode 122 of the detection in addition to 3k+1 rows；
A line (such as 3k+2 rows) sensor electrode 122 to the sensor electrode 122 in addition to 3k+1 rows applies to drive letter
Number；And
The induced signal of the sensor electrode 122 of detection 3k+1 rows.
It is appreciated that in such example, being applied in the row of the sensor electrode 122 of drive signal by reasonable selection
Number, it is possible to reduce the sensor electrode 122 for being applied in detection is total, such that it is able to reduce energy consumption.
Certainly, above example is only to embarking on journey or embarking on journey in column or sensor electrode 122 in column applies drive signal
Or drive signal change signal is obtaining the explanation of the induced signal of all the sensors electrode 122, should not limit the present invention's
Scope.
Fig. 8 is referred to, in the fingerprint sensor 10 of further embodiments of the present invention, electrode 12 is except sensor electrode 122
It is outer also to include conductive protection element 124.Multiple void regions 127, the plurality of sensing are set on the conductive protection element 124
Among device electrode 122 is separately positioned on the void region 127, and there is gap between the conductive protection element 124, with
Allow the two to insulate.
It is preferred that the conductive protection element 124 is structure as a whole, and same layer is located at the sensor electrode 122.
The conductive protection element 124 is alternatively multiple protection rings, and the plurality of protection ring surrounds the plurality of biography respectively
Sensor electrode 122 is arranged.The plurality of protection ring can be single circulus, alternatively be interconnected with one another the knot being integrated
Structure.So, the structure of the conductive protection element 124 does not limit to structure described here, is alternatively other suitable structures.
Detecting step includes following sub-step：
Drive signal is applied to conductive protection element 124；And
The induced signal of detection sensor electrode 122.
In some embodiments, above-mentioned sub-step can be realized by detection module 22, be that is to say, detection module 22 can
For applying the induced signal of drive signal and detection sensor electrode 122 to conductive protection element 124.
Fig. 3 and Fig. 4 is referred to again in the lump please, specifically, the drive module 221 connects the conductive protection element 124, carries
The conductive protection element 124 is given for the drive signal.The receiver module 223 connects the plurality of sensor electrode 122,
Receive the sensing signal from the output of sensor electrode 122.
The judge module 24 determines whether sensor electrode according to the sensing signal that the receiver module 223 is received
122 existing defects.
In the present embodiment, when performing defects detection to sensor electrode 122, the conductive protection element 124 and institute
State multiple sensor electrodes 122 and form mutual capacitance.
Similar aforementioned, the detection means 20 can be integrated in the fingerprint sensor 10 of present embodiment, alternatively independently
Device outside the fingerprint sensor 10.
The fingerprint sensor 10 further includes aforesaid fingerprint sensing circuit.The fingerprint sensing circuit is used for driving
The plurality of sensor electrode 122 performs self-tolerant fingerprint sensing.The fingerprint sensing circuit provides pumping signal to sensor
Electrode 122 simultaneously receives the fingerprint sensing signal exported from sensor electrode 122, so as to obtain finger print information.
Conductive protection element 14 is grounded in 10 fingerprint sensing of fingerprint sensor, be sensor electrode 122 play electrostatic prevent
The effect of shield.The ground signalling voltage of the ground is usually 0 volt or 0 volt or so, generally using the fingerprint sensor 10
Electronic equipment 100 (seeing below) equipment ground.It should be noted that the conductive protection element 14 directly or indirectly can connect
Ground.
When the conductive protection element 14 is indirect earthed, the conductive protection element 14 is for example directly connected to a reference
Ground (not shown), the reference ground are connected to the equipment ground by a modulation circuit (not shown).Letter in the reference ground
Number for change signal, for example, from the modulated signal of the modulation circuit.The modulation circuit is according to equipment ground
Ground signalling corresponding with voltage drive signals produce the modulated signal.
It is appreciated that in these embodiments, detected using protection ring 124, deduplication can be saved and apply to drive
The step of signal, so that improve detection efficiency.
Fig. 9 is referred to, Fig. 9 is the structural representation of an embodiment of electronic equipment of the present invention.The electronic equipment 100
Including the fingerprint sensor 10 of any of the above-described embodiment.
Specifically, electronic equipment 100 is as being portable electronic product or household formula electronic product or vehicle electronics product.
However, the electronic equipment does not limit to listed electronic product, other suitable electronic products are can also be.The portable electricity
Sub- product is, for example, mobile terminal, and the mobile terminal is, for example, mobile phone, panel computer, notebook computer, Wearable product etc.
Suitable mobile terminal.The household formula electronic product is, for example, the suitable family such as intelligent door lock, TV, refrigerator, desktop computer
Occupy formula electronic product.The vehicle electronics product is, for example, that Vehicular display device, drive recorder, navigator, car refrigerator etc. are closed
Suitable vehicle electronics product.
In some embodiments, electronic equipment 100 includes housing 104, and fingerprint sensor 10 is located in housing 104, shell
Body 104 offers through hole 106, the exposure fingerprint sensor 10 of through hole 106.
Therefore, through hole 106 can help to finger and the positioning of fingerprint sensor 10 during user's typing fingerprint, facilitate user to grasp
Make.In the present example, through hole 106 is manhole, it will be understood that other shapes such as through hole 106 is alternatively square, oval
The through hole of shape.Through hole 106 can be opened in the back position of housing 104.
The fingerprint sensor 10 may also be arranged on the suitable position such as front or side of electronic equipment 100.Further
Ground, the fingerprint sensor 10 may also be arranged on the inside of electronic equipment 100, and not necessarily expose fingerprint sensing by through hole
Device 10.
In the description of embodiments of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " length
Degree ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ",
" outward ", the orientation of the instruction such as " clockwise ", " counterclockwise " or position relationship based on orientation shown in the drawings or position relationship, are only
It is to describe for the ease of describing embodiments of the present invention and simplifying, rather than indicates or imply that the device or element of indication are necessary
With specific orientation, with specific azimuth configuration and operation, therefore it is not intended that restriction to embodiments of the present invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance or implicit
Indicate the quantity of indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or impliedly wrap
Include one or more feature.In the description of embodiments of the present invention, " multiple " are meant that two or two
More than, unless otherwise expressly limited specifically.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " being connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or one
The connection of body ground；Can be mechanically connected, or electrically connect or mutually can communicate；Can be joined directly together, it is also possible to logical
Cross intermediary to be indirectly connected to, can be connection or the interaction relationship of two elements of two element internals.For ability
For the those of ordinary skill in domain, above-mentioned term specifically containing in embodiments of the present invention can be understood as the case may be
Justice.
In embodiments of the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it
" on " or D score can include the first and second feature directly contacts, it is also possible to be not directly to connect including the first and second features
Touch but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " on
Face " includes fisrt feature directly over second feature and oblique upper, or it is special higher than second to be merely representative of fisrt feature level height
Levy.Fisrt feature second feature " under ", " lower section " and " below " include fisrt feature directly over second feature and tiltedly on
Side, or fisrt feature level height is merely representative of less than second feature.
Following disclosure provides many different embodiments or example is used for realizing embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, hereinafter the part and setting of specific examples are described.When
So, they are only merely illustrative, and purpose does not lie in the restriction present invention.Additionally, embodiments of the present invention can be in different examples
Repeat reference numerals and/or reference letter in son, this repetition are for purposes of simplicity and clarity, itself not indicate to be begged for
By the relation between various embodiments and/or setting.Additionally, the various specific technique that embodiments of the present invention are provided
With the example of material, but those of ordinary skill in the art can be appreciated that the application of other techniques and/or making for other materials
With.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically enforcement
The description of mode ", " example ", " specific example " or " some examples " etc. means the tool described with reference to the embodiment or example
Body characteristicses, structure, material or feature are contained at least one embodiment of the present invention or example.In this manual,
Identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.And, the specific features of description, knot
Structure, material or feature can be combined in one or more any embodiment or example in an appropriate manner.
In flow chart or any process for otherwise describing of here or method description are construed as, expression includes
It is one or more for realizing specific logical function or process the step of the module of code of executable instruction, fragment or portion
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not be by the suitable of shown or discussion
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or here are otherwise described in flow charts logic and/or step, for example, are considered use
In the order list of the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (as computer based system, the system including processing module or other can be from instruction
The system of execution system, device or equipment instruction fetch execute instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any can include, store, communicating, propagating or
Transmission procedure is used for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment
Device.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Connect up with one or more
Electrical connection section (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program thereon or other are suitable
Medium, because for example by carrying out optical scanning to paper or other media edlin, interpretation can then be entered or if necessary with which
Its suitable method is processed to electronically obtain described program, is then stored in computer storage.
It should be appreciated that each several part of embodiments of the present invention can be with hardware, software, firmware or combinations thereof come real
It is existing.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution system
The software or firmware of execution is realizing.For example, if realized with hardware, with another embodiment, ability can be used
Any one of following technology known to domain or their combination are realizing：With for realizing logic function to data signal
The discrete logic of logic gates, the special IC with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
Suddenly the hardware that can be by program to instruct correlation is completed, and described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, each functional unit in various embodiments of the present invention can be integrated in a processing module, also may be used
Being that unit is individually physically present, it is also possible to which two or more units are integrated in a module.It is above-mentioned integrated
Module both can be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module
If using in the form of software function module realize and as independent production marketing or use when, it is also possible to be stored in a calculating
In machine read/write memory medium.
Storage medium mentioned above can be read only memory, disk or CD etc..
Although embodiments of the present invention have been shown and described above, it is to be understood that above-mentioned embodiment is
Exemplary, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be right
Above-mentioned enforcement is implemented be changed, change, replacing and modification.
Claims (14)
1. a kind of detection method, for detecting fingerprint sensor, the fingerprint sensor includes electrode, and the electrode includes sensing
Device electrode, it is characterised in that the detection method is comprised the following steps：
Detecting step, applies drive signal to the part electrode in a predefined manner, and detects that other described electrodes are coupled to
Induced signal, until obtaining the induced signal of all sensor electrodes；And
Judge step, judge that the sensor electrode whether there is defect according to the induced signal on the sensor electrode.
2. detection method as claimed in claim 1, it is characterised in that the detecting step senses principle based on mutual capacitance type, right
The part electrode applies drive signal and detects induced signal that other described electrodes are coupled to.
3. detection method as claimed in claim 1, it is characterised in that the sensor electrode is arranged in two-dimensional array, described
Detecting step includes following sub-step：
Drive signal is applied to the sensor electrode of n*k+c row or column, wherein, k is natural number and is nature including zero, n
Number and more than or equal to 2, c be natural number and including zero, c less than n, n*k+c≤N, and c it is different from k when be zero, N be the sensing
Total line number of device electrode or total columns；
The induced signal of the sensor electrode of the detection in addition to the sensor electrode of n*k+c row or column；
Drive signal is applied to sensor electrode described in the row or column in addition to the sensor electrode of n*k+c row or column；And
The induced signal of the sensor electrode of detection n*k+c row or column.
4. detection method as claimed in claim 1, it is characterised in that the sensor electrode is arranged in two-dimensional array, described
Detecting step includes following sub-step：
Drive signal is applied to the sensor electrode of 2*k+1 row or column, wherein, 2*k+1≤N, k be natural number and including
Zero, N are total line number of the sensor electrode or total columns；
The induced signal of the sensor electrode of detection 2k row or column；
Drive signal is applied to the sensor electrode of 2k row or column；And
The induced signal of the sensor electrode of detection 2*k+1 row or column.
5. a kind of detection means, for detecting fingerprint sensor, the fingerprint sensor includes electrode, and the electrode includes sensing
Device electrode, it is characterised in that the detection means includes：
Detection module, for applying drive signal to the part electrode in a predefined manner, and detects other electrode institute couplings
The induced signal for closing, until obtain the induced signal of all sensor electrodes；And
According to the induced signal of the sensor electrode, judge module, for judging that the sensor electrode whether there is defect.
6. detection means as claimed in claim 5, it is characterised in that the detection module is to sense principle pair based on mutual capacitance type
The part electrode applies drive signal and detects induced signal that other described electrodes are coupled to.
7. detection means as claimed in claim 5, it is characterised in that the sensor electrode is arranged in two-dimensional array, described
Detection module is used for：
Drive signal is applied to the sensor electrode of n*k+c row or column, wherein, k is natural number and is nature including zero, n
Number and more than or equal to 2, c be natural number and including zero, c less than n, n*k+c≤N, and c it is different from k when be zero, N be the sensing
Total line number of device electrode or total columns；
The induced signal of the sensor electrode of the detection in addition to the sensor electrode of n*k+c row or column；
Drive signal is applied to sensor electrode described in the row or column in addition to the sensor electrode of n*k+c row or column；And
The induced signal of the sensor electrode of detection n*k+c row or column.
8. detection means as claimed in claim 5, it is characterised in that the sensor electrode is arranged in two-dimensional array, described
Detection module is used for：
Drive signal is applied to the sensor electrode of 2*k+1 row or column, wherein, 2*k+1≤N, k be natural number and including
Zero, N are total line number of the sensor electrode or total columns；
The induced signal of the sensor electrode of detection 2k row or column；
Drive signal is applied to the sensor electrode of 2k row or column；And
The induced signal of the sensor electrode of detection 2*k+1 row or column.
9. a kind of fingerprint sensor, it is characterised in that include：
Multiple sensor electrodes, arrange in two-dimensional array；With
Detection means, including：
Drive module, is connected with the plurality of sensor electrode alternative, provides drive signal to the plurality of for timesharing
Sensor electrode；
Receiver module, is connected with the plurality of sensor electrode alternative, for receiving from the plurality of sensor electrode
The sensing signal of output；With
Judge module, the sensing signal received according to the receiver module is judging whether the sensor electrode of defect.
10. fingerprint sensor as claimed in claim 9, it is characterised in that the judge module is according to the sensing letter for receiving
It is number whether identical or approximately the same judging that the sensor electrode whether there is defect.
11. fingerprint sensors as claimed in claim 9, it is characterised in that in synchronization, the drive module are passed with part
Sensor electrode is electrically connected, and the receiver module electrically connected with another part sensor electrode, two parts sensor electrode it
Between form mutual capacitance.
12. fingerprint sensors as claimed in claim 9, it is characterised in that the fingerprint sensor is in detection sensor electrode
With the presence or absence of during defect be mutual capacitance type fingerprint sensor.
13. fingerprint sensors as described in any one in claim 9-12, it is characterised in that the fingerprint sensor enters one
Step includes fingerprint sensing circuit, and the fingerprint sensing circuit is used for driving the plurality of sensor electrode to perform fingerprint sensing, institute
It is self-tolerant fingerprint sensor that fingerprint sensor is stated when fingerprint sensing is performed.
14. a kind of electronic equipment, including the fingerprint sensor described in any one in claim 9-13.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427545.XA CN106529383B (en) | 2016-06-15 | 2016-06-15 | Fingerprint sensor detection method and device, fingerprint sensor and electronic equipment |
| PCT/CN2017/087920 WO2017215562A1 (en) | 2016-06-15 | 2017-06-12 | Fingerprint sensor detection method and device, fingerprint sensor, electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427545.XA CN106529383B (en) | 2016-06-15 | 2016-06-15 | Fingerprint sensor detection method and device, fingerprint sensor and electronic equipment |
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| Publication Number | Publication Date |
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| CN106529383A true CN106529383A (en) | 2017-03-22 |
| CN106529383B CN106529383B (en) | 2023-12-05 |
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| WO (1) | WO2017215562A1 (en) |
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| WO2017215496A1 (en) * | 2016-06-15 | 2017-12-21 | 深圳信炜科技有限公司 | Fingerprint-sensor testing apparatus, fingerprint sensor, and electronic device |
| WO2017215562A1 (en) * | 2016-06-15 | 2017-12-21 | 深圳信炜科技有限公司 | Fingerprint sensor detection method and device, fingerprint sensor, electronic device |
| CN107958650A (en) * | 2017-08-17 | 2018-04-24 | 深圳信炜科技有限公司 | Biological sensing module and its drive circuit, electronic equipment |
| CN107958182A (en) * | 2017-06-08 | 2018-04-24 | 深圳信炜科技有限公司 | Fingerprint sensing device and electronic equipment |
| CN110741620A (en) * | 2017-06-12 | 2020-01-31 | 希迪普公司 | Terminal and control method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106529383B (en) | 2023-12-05 |
| WO2017215562A1 (en) | 2017-12-21 |
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